A smoke alarm that tells you there’s a fire nearby is great, but a smoke alarm that tells you there’s a fire no matter where you are is even better.

Smart smoke and carbon monoxide (CO) detectors are one of the most useful categories of smart home gear on the market, mainly because they offer a clear advantage over “dumb” versions of the same product. And if you have a second home or travel frequently, the additional peace of mind they can provide is invaluable.